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Rule Fog Hunter

Furnas - Fog Hunter - Azores

Furnas, Azores, Portugal

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread6.1°C
Visibility24135 (Clear)
Relative Humidity68%
Wind Speed4.7m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Atlantic/Azores
fog weather icon
Next opportunity
Dense Fog
Furnas
Tomorrow · 22:00–24:00 · 2h window
Medium confidence
45%
🌫️Fog Probability77.1-86%
Dewpoint Spread: 0.4°C
Visibility: 6837 (Moderate)
Relative Humidity: 98%
Wind Speed: 2.5m/s (calm conditions)

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts when volcanic topography and Atlantic weather create dramatic fog conditions across the Azores archipelago. We track humidity, temperature inversions, wind patterns, and elevation to identify when fog fills volcanic calderas while crater rims emerge above, or when ocean mist wraps coastal peaks.

The Azores' volcanic landscape creates natural bowls—massive calderas like Sete Cidades and Lagoa do Fogo—that trap fog and cloud inversions while higher rim viewpoints stay clear. The islands' mid-Atlantic position means frequent interaction with marine air masses, creating the notorious "four seasons in one day" weather that produces ever-changing fog conditions.

What makes Azores fog photography special:

  • Crater inversions - Sete Cidades caldera fills with fog while rim viewpoints offer views of twin lakes emerging from mist
  • Volcanic drama - Pico mountain's 2,351-metre peak pierces clouds, visible from neighboring islands when weather clears
  • Geothermal atmosphere - Furnas valley combines volcanic steam with natural fog, creating otherworldly layered mist
  • Hydrangea tunnels - Blue and pink hydrangeas lining roads disappear into fog during summer flowering season

Miradouro da Vista do Rei overlooking Sete Cidades becomes magical when fog partially fills the caldera—arrive at dawn to catch twin lakes emerging from white mist. Lagoa do Fogo's crater rim provides spectacular inversions when fog fills the interior while you stand in sunshine. Furnas valley combines natural fog with geothermal steam rising from fumaroles, creating complex layers especially atmospheric in early morning. From Faial island, Pico mountain appears and disappears through ocean clouds. The hydrangea-lined roads of São Miguel take on fairy-tale quality when fog drifts through in June and July. Best conditions occur when Atlantic weather systems move through, typically autumn through spring.

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72-hour requirements breakdown

What passed or failed, hour by hour
2matching hours in the next 80 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Atlantic/Azores
Fog Probability
≥ 75.0%
Sun, May 17
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Mon, May 18
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:0058%
15:0063%
16:000%
17:000%
18:000%
19:000%
20:000%
21:0055%
22:0077%
23:0086%
Tue, May 19
24:0055%
01:0055%
02:0069%
03:0049%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Wed, May 20
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog Probability mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
Atlantic/Azores
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Sun, May 17 Sunrise 06:30 Sunset 20:45
13:00
0% 11°C 0mm 68% 0cm 70° 17°C 0mm 0.63kPa 24135m 5.2m/s 4.7m/s
14:00
0% 11°C 0mm 67% 0cm 71° 17°C 0mm 0.66kPa 24135m 5.2m/s 4.7m/s
15:00
0% 11°C 0mm 66% 0cm 64° 18°C 0mm 0.68kPa 24134m 5.3m/s 4.9m/s
16:00
0% 11°C 0mm 67% 0cm 54° 17°C 0mm 0.66kPa 24134m 5.5m/s 4.8m/s
17:00
0% 11°C 0mm 68% 0cm 43° 17°C 0mm 0.64kPa 24134m 5.9m/s 5.3m/s
18:00
0% 11°C 0mm 73% 0cm 31° 16°C 0mm 0.5kPa 24135m 6.8m/s 5.8m/s
19:00
0% 12°C 0mm 79% 0cm 19° 15°C 0mm 0.37kPa 24134m 7.2m/s 5.4m/s
20:00
1% 12°C 0mm 86% 0cm 7.7° 15°C 0mm 0.24kPa 24135m 7.8m/s 4.7m/s
21:00
1% 13°C 0mm 90% 0cm -3.2° 14°C 0mm 0.17kPa 24135m 8.1m/s 4.4m/s
22:00
1% 13°C 0mm 90% 0cm -13° 15°C 0mm 0.16kPa 24135m 8m/s 4.3m/s
23:00
0% 13°C 0mm 92% 0cm -22° 15°C 0mm 0.13kPa 19298m 8m/s 4.3m/s
Mon, May 18 Sunrise 06:29 Sunset 20:46
24:00
0% 13°C 0mm 93% 0cm -28° 15°C 0mm 0.12kPa 16525m 8.1m/s 4.5m/s
01:00
0% 14°C 0mm 94% 0cm -32° 15°C 0mm 0.11kPa 15972m 8.6m/s 4.6m/s
02:00
0% 14°C 0mm 93% 0cm -32° 15°C 0mm 0.11kPa 16241m 8m/s 4.4m/s
03:00
0% 14°C 0mm 94% 0cm -29° 15°C 0mm 0.1kPa 16055m 8.4m/s 4.8m/s
04:00
0% 14°C 0mm 93% 0cm -24° 15°C 0mm 0.11kPa 16025m 9.8m/s 5.1m/s
05:00
1% 14°C 0mm 92% 0cm -16° 15°C 0mm 0.14kPa 15856m 10m/s 5.3m/s
06:00
1% 14°C 0mm 93% 0cm -5.8° 15°C 0mm 0.12kPa 15895m 10m/s 4.7m/s
07:00
10% 14°C 0mm 93% 0cm 4.9° 15°C 0mm 0.11kPa 24134m 9.8m/s 4.7m/s
08:00
19% 14°C 0mm 91% 0cm 16° 15°C 0mm 0.16kPa 24135m 9.4m/s 5m/s
09:00
28% 14°C 0mm 87% 0cm 28° 16°C 0mm 0.24kPa 24135m 9.4m/s 5.3m/s
10:00
20% 14°C 0mm 87% 0cm 40° 17°C 0mm 0.25kPa 24134m 9.5m/s 5.4m/s
11:00
11% 15°C 0mm 87% 0cm 51° 17°C 0mm 0.24kPa 15849m 9.1m/s 5.3m/s
12:00
3% 15°C 0.03mm 87% 0cm 62° 17°C 0mm 0.26kPa 24134m 9.4m/s 5.7m/s
13:00
8% 15°C 0.07mm 92% 0cm 70° 16°C 0.06mm 0.14kPa 24135m 9.2m/s 5.1m/s
14:00
13% 16°C 0.05mm 96% 0cm 71° 16°C 0.06mm 0.08kPa 1184m 8.8m/s 4.6m/s
15:00
18% 16°C 0.02mm 96% 0cm 65° 16°C 0.13mm 0.07kPa 284m 8.8m/s 4.4m/s
16:00
22% 16°C 0mm 94% 0cm 54° 17°C 0.13mm 0.12kPa 668m 8.5m/s 4.7m/s
17:00
26% 15°C 0mm 92% 0cm 43° 17°C 0.19mm 0.16kPa 24135m 8.9m/s 4.8m/s
18:00
30% 15°C 0.01mm 84% 0cm 31° 17°C 0.25mm 0.31kPa 24135m 6.7m/s 4m/s
19:00
40% 14°C 0mm 85% 0cm 19° 17°C 0mm 0.29kPa 24135m 5.8m/s 4m/s
20:00
50% 15°C 0mm 91% 0cm 7.8° 16°C 0mm 0.16kPa 24135m 5.6m/s 3.7m/s
21:00
60% 14°C 0mm 97% 0cm -3° 15°C 0mm 0.05kPa 16049m 3.8m/s 3m/s
22:00
51% 14°C 0mm 98% 0cm -13° 15°C 0mm 0.04kPa 8219m 4.1m/s 2.7m/s
23:00
42% 14°C 0.01mm 98% 0cm -22° 14°C 0.06mm 0.04kPa 6837m 4m/s 2.5m/s
Tue, May 19 Sunrise 06:28 Sunset 20:47
24:00
33% 14°C 0.01mm 97% 0cm -28° 15°C 0.06mm 0.05kPa 24134m 4.5m/s 2.7m/s
01:00
25% 15°C 0.01mm 97% 0cm -32° 15°C 0mm 0.06kPa 16083m 5m/s 2.7m/s
02:00
16% 15°C 0mm 99% 0cm -32° 15°C 0.06mm 0.02kPa 369m 6.9m/s 3.3m/s
03:00
8% 15°C 0mm 97% 0cm -29° 16°C 0.06mm 0.05kPa 7277m 7m/s 4m/s
04:00
6% 14°C 0mm 91% 0cm -23° 16°C 0.06mm 0.15kPa 24134m 6.5m/s 4.2m/s
05:00
5% 14°C 0.01mm 92% 0cm -15° 15°C 0.13mm 0.14kPa 24135m 5.5m/s 3.5m/s
06:00
3% 15°C 1.9mm 99% 0cm -5.7° 15°C 0.63mm 0.02kPa 580m 8.2m/s 4.4m/s
07:00
2% 16°C 0.07mm 99% 0cm 5.1° 16°C 0.69mm 0.02kPa 511m 10m/s 6m/s
08:00
2% 16°C 0.17mm 98% 0cm 16° 16°C 0.94mm 0.03kPa 2823m 11m/s 6.1m/s
09:00
1% 16°C 0.4mm 99% 0cm 28° 16°C 1.4mm 0.02kPa 165m 10m/s 5.8m/s
10:00
1% 16°C 0.03mm 98% 0cm 40° 16°C 1.8mm 0.03kPa 214m 12m/s 6.9m/s
11:00
0% 16°C 0.05mm 97% 0cm 51° 16°C 1.9mm 0.06kPa 6596m 13m/s 7.1m/s
12:00
0% 16°C 0mm 97% 0cm 62° 16°C 1.9mm 0.06kPa 6424m 14m/s 7.5m/s
13:00
0% 16°C 0mm 95% 0cm 70° 17°C 0.06mm 0.09kPa 6457m 16m/s 8.6m/s
14:00
0% 16°C 0.01mm 94% 0cm 71° 17°C 0.06mm 0.11kPa 6645m 16m/s 9m/s
15:00
0% 16°C 0mm 93% 0cm 65° 17°C 0.13mm 0.13kPa 17087m 16m/s 8.8m/s
16:00
0% 16°C 0mm 93% 0cm 54° 17°C 0.13mm 0.14kPa 24135m 16m/s 8.9m/s
17:00
0% 16°C 0mm 93% 0cm 43° 17°C 0.13mm 0.14kPa 23361m 16m/s 9.1m/s
18:00
0% 15°C 2.7mm 95% 0cm 31° 16°C 1mm 0.08kPa 3293m 16m/s 8.6m/s
19:00
1% 15°C 2.6mm 93% 0cm 19° 16°C 2.9mm 0.13kPa 5473m 17m/s 9.9m/s
20:00
1% 15°C 2.5mm 91% 0cm 17°C 4.8mm 0.17kPa 7652m 18m/s 11m/s
21:00
2% 15°C 2.4mm 89% 0cm -2.9° 17°C 6.7mm 0.22kPa 9832m 18m/s 13m/s
22:00
1% 15°C 2.1mm 89% 0cm -13° 17°C 13mm 0.21kPa 12027m 18m/s 13m/s
23:00
1% 15°C 1.9mm 90% 0cm -21° 17°C 19mm 0.2kPa 14221m 18m/s 13m/s
Wed, May 20 Sunrise 06:27 Sunset 20:48
24:00
0% 15°C 1.6mm 90% 0cm -28° 17°C 24mm 0.19kPa 16416m 18m/s 13m/s
01:00
1% 14°C 1.1mm 88% 0cm -32° 16°C 17mm 0.22kPa 18989m 16m/s 11m/s
02:00
1% 14°C 0.55mm 86% 0cm -32° 16°C 9.5mm 0.25kPa 21562m 13m/s 8.7m/s
03:00
2% 13°C 0.01mm 84% 0cm -29° 16°C 2.1mm 0.28kPa 24135m 11m/s 6.6m/s
04:00
1% 13°C 0.007mm 82% 0cm -23° 16°C 2.1mm 0.32kPa 24135m 11m/s 7.2m/s
05:00
1% 13°C 0.003mm 81% 0cm -15° 16°C 2.1mm 0.36kPa 24135m 11m/s 7.9m/s
06:00
0% 13°C 0mm 79% 0cm -5.6° 17°C 2.1mm 0.39kPa 24135m 11m/s 8.5m/s
07:00
9% 13°C 0mm 78% 0cm 5.2° 17°C 1.4mm 0.42kPa 24135m 11m/s 8.4m/s
08:00
19% 13°C 0mm 77% 0cm 16° 17°C 0.69mm 0.44kPa 24135m 11m/s 8.2m/s
09:00
28% 13°C 0mm 76% 0cm 28° 17°C 0mm 0.46kPa 24135m 10m/s 8m/s
10:00
30% 13°C 0.003mm 76% 0cm 40° 17°C 0mm 0.46kPa 24135m 10m/s 8m/s
11:00
31% 13°C 0.007mm 76% 0cm 52° 17°C 0mm 0.45kPa 24135m 10m/s 7.9m/s
12:00
33% 13°C 0.01mm 76% 0cm 62° 17°C 0mm 0.45kPa 24135m 9.8m/s 7.9m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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